Datasheet > ALD521D

ALD521D

更新时间： 2024-09-28 22:50:07

品牌	Logo	应用领域
先进线性 - ALD		控制器
页数	文件大小	规格书
6页	44K
描述
24 BIT SERIAL INTERFACE DIGITAL CONTROLLER

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ALD521D 数据手册

ADVANCED

LINEAR

DEVICES, INC.

ALD521D

24 BIT SERIAL INTERFACE DIGITAL CONTROLLER

FEATURES AND BENEFITS

APPLICATIONS

• Operate in conjunction with ALD500/ALD500R

Precision analog signal processors

• Low cost, simple functionality

• High accuracy DC voltage measurement functions

• Portable battery operated instruments

• PC-based software control or stand-alone operation (without

other processors or PC)

• Serial digital output interface to other microprocessors or

microcontrollers

• PC parallel printer port interface standard

• Support resolution up to 23 binary bits + sign

polarity bit

• Easy to use to acquire up to 23 bit linearity

and noise performance

• Integration time can be set by the user

• Easy user evaluation and setting of

conversion parameters

GENERAL DESCRIPTION

The ALD521D is a digital controller designed to interface to the ALD500

or ALD500R integrating dual slope analog processors as a chip set for

building a precision analog-to-digital converter. With the ALD521D and

ALD500R, together with a few external capacitors and resistors, a

precision Analog to Digital converter with auto zero and auto-polarity

can be implemented.

• Low power dissipation - 4 mA typical

including crystal oscillator

• On-chip Crystal Oscillator Circuit

• Two way asynchronous handshake data

transfer

• Conversion speed versus resolution trade-off

• Power down (sleep mode) control input to

power down to 2 µA

The ALD521D can operate in either a stand-alone mode or in an

external microprocessor control mode. In the stand-alone mode, the

ALD521D can either making continuous measurements or a single

measurement. Under external microprocessor control, the ALD521D

can directly interact with a PC under PC software control via a standard

parallelprinterport withnoothercomponents,oritcanalsocommunicate

with other microcontrollers serially.

• Chip Select control input

• High impedance DV, DOUT and SCLK

when chip not selected

• Single 3 V to 5 V power supply

The ALD500/ALD500R analog processors consist of on-chip digital

control circuitry to accept control inputs, integrating buffer amplifiers,

analogswitches,andvoltagecomparators. Itfunctionsinfouroperating

modes, or phases, namely auto zero, integrate, deintegrate, and

integrator zero phases. At the end of a conversion, the comparator

output goes from high to low when the integrator crosses zero during

deintegration. ALD500 analog processors also provide direct logic

interface to CMOS logic families.

PIN CONFIGURATION

ALD521D

OUT

PWRUP

OUT

ORDERING INFORMATION

Operating Temperature Range *

DGND

XTAL

OUT

0°C to +70°C

XTAL

OUT

CLK

18-Pin

Plastic Pin

Package

Small Outline

Package (SOIC)

N/C

PD, SD PACKAGE

ALD521DPD

ALD521DSD

* Note: N/C - No Conncection

* Contact factory for industrial temperature range

http://www.aldinc.com

12 3 4 5 6

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与ALD521D相关器件

型号	品牌	获取价格	描述	数据表
ALD521DPD	ALD	获取价格	24 BIT SERIAL INTERFACE DIGITAL CONTROLLER
ALD521DSD	ALD	获取价格	24 BIT SERIAL INTERFACE DIGITAL CONTROLLER
ALD523D	ALD	获取价格	MULTIFUNCTION 7 - DIGIT SERIAL INPUT DISPLAY MODULE CONTROLLER
ALD523DPH	ALD	获取价格	MULTIFUNCTION 7 - DIGIT SERIAL INPUT DISPLAY MODULE CONTROLLER
ALD523DSH	ALD	获取价格	MULTIFUNCTION 7 - DIGIT SERIAL INPUT DISPLAY MODULE CONTROLLER
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ALD555-1PA	ETC	获取价格	Analog Timer Circuit
ALD555-1SA	ETC	获取价格	Analog Timer Circuit
ALD555CA	ETC	获取价格	Analog Timer Circuit

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